diff options
Diffstat (limited to 'tiff/html/man/TIFFcolor.3tiff.html')
| -rwxr-xr-x | tiff/html/man/TIFFcolor.3tiff.html | 975 |
1 files changed, 0 insertions, 975 deletions
diff --git a/tiff/html/man/TIFFcolor.3tiff.html b/tiff/html/man/TIFFcolor.3tiff.html deleted file mode 100755 index edf423b..0000000 --- a/tiff/html/man/TIFFcolor.3tiff.html +++ /dev/null @@ -1,975 +0,0 @@ -<!-- Creator : groff version 1.18.1 --> -<!-- CreationDate: Sat Feb 24 18:37:16 2007 --> -<html> -<head> -<meta name="generator" content="groff -Thtml, see www.gnu.org"> -<meta name="Content-Style" content="text/css"> -<title>COLOR</title> -</head> -<body> - -<h1 align=center>COLOR</h1> -<a href="#NAME">NAME</a><br> -<a href="#SYNOPSIS">SYNOPSIS</a><br> -<a href="#DESCRIPTION">DESCRIPTION</a><br> -<a href="#SEE ALSO">SEE ALSO</a><br> - -<hr> -<a name="NAME"></a> -<h2>NAME</h2> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="8%"></td> -<td width="91%"> -<p>TIFFYCbCrToRGBInit, TIFFYCbCrtoRGB, TIFFCIELabToRGBInit, -TIFFCIELabToXYZ, TIFFXYZToRGB − color conversion -routines.</p> -</td> -</table> -<a name="SYNOPSIS"></a> -<h2>SYNOPSIS</h2> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="8%"></td> -<td width="91%"> -<p><b>#include <tiffio.h></b></p> -<!-- INDENTATION --> -<p><b>int TIFFYCbCrToRGBInit(TIFFYCbCrToRGB -*</b><i>ycbcr</i><b>, float *</b><i>luma</i><b>, float -*</b><i>refBlackWhite"</i><b>);"<br> -void TIFFYCbCrtoRGB(TIFFYCbCrToRGB *</b><i>ycbcr</i><b>, -uint32</b> <i>Y</i><b>, int32</b> <i>Cb</i><b>, int32</b> -<i>Cr</i><b>, uint32 *</b><i>R</i><b>, uint32 -*</b><i>G</i><b>, uint32 *</b><i>B</i> <b>);</b></p> -<!-- INDENTATION --> -<p><b>int TIFFCIELabToRGBInit(TIFFCIELabToRGB -*</b><i>cielab</i><b>, TIFFDisplay *</b><i>display</i><b>, -float *</b><i>refWhite</i><b>);<br> -void TIFFCIELabToXYZ(TIFFCIELabToRGB *</b><i>cielab</i><b>, -uint32</b> <i>L</i><b>, int32</b> <i>a</i><b>, int32</b> -<i>b</i><b>, float *</b><i>X</i><b>, float *</b><i>Y</i><b>, -float *</b><i>Z</i><b>);<br> -void TIFFXYZToRGB(TIFFCIELabToRGB *</b><i>cielab</i><b>, -float</b> <i>X</i><b>, float</b> <i>Y</i><b>, float</b> -<i>Z"</i><b>,</b><i>uint32</i><b>*"</b><i>R</i><b>, -uint32 *</b><i>G</i><b>, uint32 *</b><i>B</i><b>);</b></p> -</td> -</table> -<a name="DESCRIPTION"></a> -<h2>DESCRIPTION</h2> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="8%"></td> -<td width="91%"> -<p>TIFF supports several color spaces for images stored in -that format. There is usually a problem of application to -handle the data properly and convert between different -colorspaces for displaying and printing purposes. To -simplify this task libtiff implements several color -conversion routines itself. In particular, these routines -used in <b>TIFFRGBAImage(3TIFF)</b> interface.</p> -<!-- INDENTATION --> -<p><b>TIFFYCbCrToRGBInit()</b> used to initialize -<i>YCbCr</i> to <i>RGB</i> conversion state. Allocating and -freeing of the <i>ycbcr</i> structure belongs to programmer. -<i>TIFFYCbCrToRGB</i> defined in <b>tiffio.h</b> as</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<pre>typedef struct { /* YCbCr->RGB support */ - TIFFRGBValue* clamptab; /* range clamping table */ -</pre> -</td> -</table> -<!-- TABS --> - -<table width="100%" border=0 rules="none" frame="void" - cols="5" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> - -<p>int*</p> -<td width="28%"></td> -<td width="-3%"></td> -<td width="12%"></td> -<td width="6%"> - -<p>Cr_r_tab;<br> -int*</p> -</td> -<td width="56%"> -</td> -<tr valign="top" align="left"> -<td width="28%"></td> -<td width="-3%"></td> -<td width="12%"></td> -<td width="6%"> - -<p>Cb_b_tab;<br> -int32*</p> -</td> -<td width="56%"> -</td> -<tr valign="top" align="left"> -<td width="28%"></td> -<td width="-3%"></td> -<td width="12%"></td> -<td width="6%"> - -<p>Cr_g_tab;<br> -int32*</p> -</td> -<td width="56%"> -</td> -<tr valign="top" align="left"> -<td width="28%"></td> -<td width="-3%"></td> -<td width="12%"></td> -<td width="6%"> - -<p>Cb_g_tab;</p> -</td> -<td width="56%"> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>int32* Y_tab;<br> -} TIFFYCbCrToRGB;</p></td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="8%"></td> -<td width="91%"> -<p><i>luma</i> is a float array of three values representing -proportions of the red, green and blue in luminance, Y (see -section 21 of the TIFF 6.0 specification, where the YCbCr -images discussed). <i>TIFFTAG_YCBCRCOEFFICIENTS</i> holds -that values in TIFF file. <i>refBlackWhite</i> is a float -array of 6 values which specifies a pair of headroom and -footroom image data values (codes) for each image component -(see section 20 of the TIFF 6.0 specification where the -colorinmetry fields discussed). -<i>TIFFTAG_REFERENCEBLACKWHITE</i> is responsible for -storing these values in TIFF file. Following code snippet -should helps to understand the the technique:</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<pre>float *luma, *refBlackWhite; -uint16 hs, vs; - -/* Initialize structures */ -ycbcr = (TIFFYCbCrToRGB*) -</pre> -</td> -</table> -<!-- TABS --> - -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>_TIFFmalloc(TIFFroundup(sizeof(TIFFYCbCrToRGB), -sizeof(long))</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>+ 4*256*sizeof(TIFFRGBValue)</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>+ 2*256*sizeof(int)</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>+ 3*256*sizeof(int32));</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>if (ycbcr == NULL) {<br> -TIFFError("YCbCr->RGB",</p></td> -</table> -<!-- TABS --> -<table width="100%" border=0 rules="none" frame="void" - cols="4" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>"No space for YCbCr->RGB conversion -state");</p> -</td> -<td width="62%"> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>exit(0);<br> -}</p> -<!-- INDENTATION --> -<p>TIFFGetFieldDefaulted(tif, TIFFTAG_YCBCRCOEFFICIENTS, -&luma);<br> -TIFFGetFieldDefaulted(tif, TIFFTAG_REFERENCEBLACKWHITE, -&refBlackWhite);<br> -if (TIFFYCbCrToRGBInit(ycbcr, luma, refBlackWhite) < -0)</p></td> -</table> -<!-- TABS --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>exit(0);</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>/* Start conversion */<br> -uint32 r, g, b;<br> -uint32 Y;<br> -int32 Cb, Cr;</p> -<!-- INDENTATION --> -<p>for each pixel in image</p></td> -</table> -<!-- TABS --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>TIFFYCbCrtoRGB(img->ycbcr, Y, Cb, Cr, &r, &g, -&b);</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>/* Free state structure */<br> -_TIFFfree(ycbcr);</p></td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="8%"></td> -<td width="91%"> -<p><b>TIFFCIELabToRGBInit()</b> initializes the <i>CIE -L*a*b* 1976</i> to <i>RGB</i> conversion state. -<b>TIFFCIELabToRGB</b> defined as</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<pre>#define CIELABTORGB_TABLE_RANGE 1500 - -</pre> -</td> -</table> -<!-- TABS --> - -<table width="100%" border=0 rules="none" frame="void" - cols="9" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="6%"> - -<p>typedef struct {</p> -</td> -<td width="6%"></td> -<td width="6%"></td> -<td width="6%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>/* CIE Lab 1976->RGB support */</p> -</td> -<td width="6%"></td> -<td width="37%"> -</td> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>int</p> -</td> -<td width="6%"> - -<p>range;</p> -</td> -<td width="6%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>/* Size of conversion table */</p> -</td> -<td width="6%"></td> -<td width="37%"> -</td> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>float</p> -</td> -<td width="6%"></td> -<td width="6%"> - -<p>rstep, gstep, bstep;</p> -</td> -<td width="6%"></td> -<td width="6%"></td> -<td width="6%"></td> -<td width="37%"> -</td> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>float</p> -</td> -<td width="6%"></td> -<td width="6%"> - -<p>X0, Y0, Z0;</p> -</td> -<td width="6%"></td> -<td width="6%"></td> -<td width="6%"> - -<p>/* Reference white point */</p> -</td> -<td width="37%"> -</td> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="6%"></td> -<td width="6%"> - -<p>TIFFDisplay display;</p> -</td> -<td width="6%"></td> -<td width="6%"></td> -<td width="6%"></td> -<td width="6%"></td> -<td width="6%"></td> -<td width="37%"> -</td> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>float</p> -</td> -<td width="6%"></td> -<td width="6%"> - -<p>Yr2r[CIELABTORGB_TABLE_RANGE + 1]; /* Conversion of Yr -to r */</p> -</td> -<td width="6%"></td> -<td width="6%"></td> -<td width="6%"></td> -<td width="37%"> -</td> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>float</p> -</td> -<td width="6%"></td> -<td width="6%"> - -<p>Yg2g[CIELABTORGB_TABLE_RANGE + 1]; /* Conversion of Yg -to g */</p> -</td> -<td width="6%"></td> -<td width="6%"></td> -<td width="6%"></td> -<td width="37%"> -</td> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>float</p> -</td> -<td width="6%"></td> -<td width="6%"> - -<p>Yb2b[CIELABTORGB_TABLE_RANGE + 1]; /* Conversion of Yb -to b */</p> -</td> -<td width="6%"></td> -<td width="6%"></td> -<td width="6%"></td> -<td width="37%"> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>} TIFFCIELabToRGB;</p></td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="8%"></td> -<td width="91%"> -<p><i>display</i> is a display device description, declared -as</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<pre>typedef struct { -</pre> -</td> -</table> -<!-- TABS --> - -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>float d_mat[3][3]; /* XYZ -> luminance matrix */</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>float d_YCR; /* Light o/p for reference white */</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>float d_YCG;</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>float d_YCB;</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>uint32 d_Vrwr; /* Pixel values for ref. white */</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>uint32 d_Vrwg;</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>uint32 d_Vrwb;</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>float d_Y0R; /* Residual light for black pixel */</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>float d_Y0G;</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>float d_Y0B;</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>float d_gammaR; /* Gamma values for the three guns -*/</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>float d_gammaG;</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>float d_gammaB;</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>} TIFFDisplay;</p></td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="8%"></td> -<td width="91%"> -<p>For example, the one can use sRGB device, which has the -following parameters:</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<pre>TIFFDisplay display_sRGB = { -</pre> -</td> -</table> -<!-- TABS --> - -<table width="100%" border=0 rules="none" frame="void" - cols="5" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>{ /* XYZ -> luminance matrix */</p> -</td> -<td width="6%"></td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>{ 3.2410F, -1.5374F, -0.4986F },</p> -</td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>{ -0.9692F, 1.8760F, 0.0416F },</p> -</td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>{ 0.0556F, -0.2040F, 1.0570F }</p> -</td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>},</p> -</td> -<td width="6%"> -</td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>100.0F, 100.0F, 100.0F, /* Light o/p for reference white -*/</p> -</td> -<td width="6%"></td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>255, 255, 255, /* Pixel values for ref. white */</p> -</td> -<td width="6%"></td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>1.0F, 1.0F, 1.0F, /* Residual light o/p for black pixel -*/</p> -</td> -<td width="6%"></td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>2.4F, 2.4F, 2.4F, /* Gamma values for the three guns -*/</p> -</td> -<td width="6%"></td> -<td width="62%"> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>};</p></td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="8%"></td> -<td width="91%"> -<p><i>refWhite</i> is a color temperature of the reference -white. The <i>TIFFTAG_WHITEPOINT</i> contains the -chromaticity of the white point of the image from where the -reference white can be calculated using following -formulae:</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>refWhite_Y = 100.0<br> -refWhite_X = whitePoint_x / whitePoint_y * refWhite_Y<br> -refWhite_Z = (1.0 - whitePoint_x - whitePoint_y) / -whitePoint_y * refWhite_X</p></td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="8%"></td> -<td width="91%"> -<p>The conversion itself performed in two steps: at the -first one we will convert <i>CIE L*a*b* 1976</i> to <i>CIE -XYZ</i> using <b>TIFFCIELabToXYZ()</b> routine, and at the -second step we will convert <i>CIE XYZ</i> to <i>RGB</i> -using <b>TIFFXYZToRGB().</b> Look at the code sample -below:</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<pre>float *whitePoint; -float refWhite[3]; - -/* Initialize structures */ -img->cielab = (TIFFCIELabToRGB *) -</pre> -</td> -</table> -<!-- TABS --> - -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>_TIFFmalloc(sizeof(TIFFCIELabToRGB));</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>if (!cielab) {</p></td> -</table> -<!-- TABS --> -<table width="100%" border=0 rules="none" frame="void" - cols="5" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>TIFFError("CIE L*a*b*->RGB",</p> -</td> -<td width="6%"></td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>"No space for CIE L*a*b*->RGB conversion -state.");</p> -</td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>exit(0);</p> -</td> -<td width="6%"></td> -<td width="62%"> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>}</p> -<!-- INDENTATION --> -<p>TIFFGetFieldDefaulted(tif, TIFFTAG_WHITEPOINT, -&whitePoint);<br> -refWhite[1] = 100.0F;<br> -refWhite[0] = whitePoint[0] / whitePoint[1] * -refWhite[1];<br> -refWhite[2] = (1.0F - whitePoint[0] - -whitePoint[1])</p></td> -</table> -<!-- TABS --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>/ whitePoint[1] * refWhite[1];</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>if (TIFFCIELabToRGBInit(cielab, &display_sRGB, -refWhite) < 0) {</p></td> -</table> -<!-- TABS --> -<table width="100%" border=0 rules="none" frame="void" - cols="5" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>TIFFError("CIE L*a*b*->RGB",</p> -</td> -<td width="6%"></td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> -</td> -<td width="6%"> - -<p>"Failed to initialize CIE L*a*b*->RGB conversion -state.");</p> -</td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>_TIFFfree(cielab);</p> -</td> -<td width="6%"></td> -<td width="62%"> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="0%"></td> -<td width="6%"> - -<p>exit(0);</p> -</td> -<td width="6%"></td> -<td width="62%"> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>}</p> -<!-- INDENTATION --> -<p>/* Now we can start to convert */<br> -uint32 r, g, b;<br> -uint32 L;<br> -int32 a, b;<br> -float X, Y, Z;</p> -<!-- INDENTATION --> -<p>for each pixel in image</p></td> -</table> -<!-- TABS --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>TIFFCIELabToXYZ(cielab, L, a, b, &X, &Y, -&Z);</p> -</td> -<tr valign="top" align="left"> -<td width="24%"></td> -<td width="75%"> - -<p>TIFFXYZToRGB(cielab, X, Y, Z, &r, &g, -&b);</p> -</td> -</table> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="17%"></td> -<td width="82%"> -<p>/* Don’t forget to free the state structure */<br> -_TIFFfree(cielab);</p></td> -</table> -<a name="SEE ALSO"></a> -<h2>SEE ALSO</h2> -<!-- INDENTATION --> -<table width="100%" border=0 rules="none" frame="void" - cols="2" cellspacing="0" cellpadding="0"> -<tr valign="top" align="left"> -<td width="8%"></td> -<td width="91%"> -<p><b>TIFFRGBAImage</b>(3TIFF) <b>libtiff</b>(3TIFF),</p> -<!-- INDENTATION --> -<p>Libtiff library home page: -<b>http://www.remotesensing.org/libtiff/</b></p> -</td> -</table> -<hr> -</body> -</html> |